CVE-2025-68158

Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under _state_{app}_{state}, and get_state_data ignores the caller’s session altogether. This issue has been patched in version 1.6.6.

• CWE-352

• https://github.com/authlib/authlib/commit/2808378611dd6fb2532b189a9087877d8f0c0489Patch
• https://github.com/authlib/authlib/commit/7974f45e4d7492ab5f527577677f2770ce423228Patch
• https://github.com/authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523Exploit, Vendor Advisory
• https://github.com/authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523Exploit, Vendor Advisory

Published

Jan 8, 2026

Last Modified

Jun 17, 2026

Status

Modified

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